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1:roofing feltis processed by making the paper base soaked in low softening petroleum asphalt, then covered with high softening petroleum asphalt in both sides, then coated with isolating materials.
2:It is widely applied to the simple waterproofing, temporary-building waterproofing, building damp proofing and packing, multilayers waterproofing of building roofs, underground facilities, water conservancy projects and so on.